Heating-stove



(No Model.)

s. H. LA RUE.

HEATING STOVE.

No. 310,596. Patented an; 13, 1885..

WITNESSES nv VE/VTOI? Lil UNiTnn fiTATns PATENT Urrncn.

SILAS H. LA RUE, OF READING, PENNSYLVANIA.

HEATING -STOVE.

SPECIFICATION forming part of Letters Patent No. 310,596, dated January 13, 1885.

Application filed October 10, 1883.

To aZZ whom it may concern Be it known that I, SILAs H. LA RUE, a citizen of the United States, and a resident in the city of Reading, in the county of Berks and State of Pennsylvania, have invented certain new and useful Improvements in Heating- Stovcs, ofwhich the following, taken in connection with the accompanying drawings, which constitute a part of the specification, is a full, clear, and exact description.

The invention relates to that class of stoves which are provided with a fuel magazine or feeder, and with one or more chambers in which air is warmed, and from which it is afterward discharged cit-her into the apartment in which the stove is placed or through suitable passages into other apartments; and the invention consists in certain peculiarities in the construction of individual elements of which the stove is composed, and in their various novel combinations, as will be hereinafter described, and then pointed out in the claims.

In the drawings, Figure 1 is a central Vertical section from front to rear of the stove. Fig. 2 is a rear elevation and partial section the smoke-exit pipe and the air-exit pipe being removed-ofthe upper portion ofthe stove. Fig. 3 is a View showing in elevation the lower rear portion of the stove. Fig. 4 is a horizon tal section taken on the line a: .70 of Fig. 1, showing the relation of the feed-chute and the passage which encircles it.

A is the stove; B,- the fire-pot; a, the upper section of the fire-pot; a, the fire-brick lining of the fire-pot at its sides and front; a, the fire-brick rear lining of the fire-pot, which extends downwardly behind the lower section of the fire-pot also. I) is the lower section of the fire-pot. O is the ash-chamber or ashpit; D, the combustion-chamber; an, the fuel magazine, imperforate, as shown; a, the feed chute to the fuel-magazine; It, the directexit chamber or passage; It, the exit-opening; 1', the exit pipe connected with the exit-opening; S, the damper which controls the passage to the exit-chamber. o is a flue or upward continuation of the combustion-chamber, through which the products of combustion pass when the damper S is closed. I? is the gas-chamber and indirect smoke-passage which encircles the feed-chute.

(No model.)

1) is an orifice for the passage of smoke and gas from the combustion-chamber to the gaschamber. 0 is the door for closing the fuelmagazine. 1) is the door for closing the feedchute to the fuel-magazine. X is a chain which connects the doors 0 and p. p is a knob or handle attached to the door 1). K is a passage or flue chamber formed. behind the door 0 when it is thrown open, as shown in dotted lines, which passage or chamber is at all times in open communication with the smoke and gas passage which encircles the feed-chute. o is the downtake-flue of the indirect-draft passage. h is a hot-air chamber formed as to its upper annular portion by the outer wall of the stove and the inner wall, a, closed at its top by the bottom plate of the upper indirecteXit passage, and closed also at its bottom, at the front and sides, by the plate at, as shown partly in section, and in part indicated by dotted lines in, Fig. l, which may be either curved, as shown, or otherwise, and extending downwardly so as to embrace the rear portion of the. stove nearly to the base of the same, as shown in section in Figs. 1, 2, and 3, a being the bot-tom plate of the chamber at that point. q are orifices in the wall of the stove for the admission of air to the chamber h in its upper portion, and q q are openings behind the ash-chamber for admitting air to that portion of the air-warming chamber. t t" are openings in the rear wall of the stove, on either side of the indirect-draft passage 11, through which air warmed in the chamber his discharged into a rear chamber, a", from which it may be discharged through orifices j, which are controlled by a register, j, into the apartment in which the stove is placed, or through a conducting-pipe, a, which is controlled by a damper, 01?, into an upper apartment. f is an orifice in the lower wall of the eXit-chamher It, with which is connected a dust and check-draft passage, d, which, at its lower extremity, connects with a similar orifice, d, in the rear wall of the ash-chamber, (1 being a closing-slide for this lower orifice. The passage d, it will be observed, is wholly outside of the rear portion of the air-warming chamher, and does not diminish its capacity;

In the front of the stove, t represents one of a series of mica doors or windows opposite the combustion-chamber; t, a similar series opposite the double fire-pot; and t is the ashpit door provided with the usual air-inlet openings and register-slide for closing the same, these latter not being represented in the drawings.

In Fig.1, G is the front and \V is the rear section of a grate which may be used in connection with the stove.

In Fig. 2, s is an operating-handle to actuate the damper S, and in Fig. 1, E is an orifice in the upper wall of the exit-chamber, through which the indirect-draft current is received from the fiue '0.

Insteadof the location indicated in Fig. 3, the openings q may be in the lower extremity, 'lt, of the air-casing.

To persons skilled in the art to which the invention relates the operation of the stove will be apparent from the foregoing descrip tion.

A fire being kindled upon the grate, and the lower fire-pot section, the upper fire-pot section, (the metallic portion a' of which may or may not be provided with the projecting bars a*,) and the magazine being successively filled with fuel, the direct-draft damper being open, the products of combustion will flow directly to the exit-chamber, as indicated by the unfeathered arrows. If the combustion becomes too active, on closing the damper S the products will pass, as indicated by the single-feathered arrows, first upwardly to and through the orifice p, and then--passing rearwardly along each side of the feed-ch.ute downwardly through the rear flue, o, to the place of exit. If it be desired to still further check the process of combustion, the air-inlets in the door of the ash-pit will be closed, and the slide (2 will be moved to open the dust and check-draft fluezl, when air will pass upwardly, as shown by the full-feathered arrow, through this flue, to the exit-chamber R, where it will meet the downward flow through the opposite upper passage, o, and an eddying action of the intermingling currents will be produced, which will effectually stifle the fire, which, however, will be kept alive by the slight draft through the indirect passage, which, it will have been. observed, is at all times free and unobstructed. Under the circumstances described the consumption of fuel is very slight, and a dull fire may be maintained for. a long period of time without any attention whatever. The facility and economy with which, without care, one or more apartments may thus be comfortably warmed has been found in practice to constitute a most valuable function of the stove.

It is obvious that whether the damper of the direct-exit opening be open or closed the volume of air which will pass upwardly through the fuel-chamber will be diminished in a degree exactly corresponding to the volume which passes from the air-induction chamber through the check-draft flue. This checkdraft flue, it will be apparent at a glance, possesses the twofold function of an air-flue for diminishing the draft through the fire-charm ber and an escape-passage for dust when the fuel is agitated. It is equally apparent that the location of the check-draft flue outside the hot-air chamber renders available for air heating purposes the entire rear portion of the stove.

The connection of the two horizontal doors at the top of the stove in the manner shown is advantageous in various respects. In most constructions the lid or cover of the magazine is removable only by the insertion into a cavity within it of a lid-lifter, as is done in cooking stoves and ranges. Under the construction herein represented this inconvenience is avoided. In some instances the lid of the magazine and the lid of the stove properhave been so connected as to be removed together from the stove. In such constructions the space behind the feed-opening of the magazine and between the opening and the diving or indirect-exit fiue has necessarily been left open, so that in supplying fuel portions there- 'of have tumbled into this rear indirect flue and obstructed the circulation through it. In this construction the choking up of the rear indirect flue in the manner described is pre vented by the magazine-lid itself, which, on being lifted, standsas indicated by the dotted lines in Fig. 1.direetly across the passage to the indirect line, so that any portions of the fuel which, in feeding, may strike against it will be precipitated into the magazine.

A third important advantage is found in the certainty and facility with which accumulations of gas within the magazine at its top are carried into the exit-flue of the stove.

In all magazine-stoves gases evolved by combustion of the fuel collect in the upper portion of the magazine, and in one way or an other portions of the same have found their way out of the top of the stove to the great annoyance of the occupants of the apartment. It is apparent that this is eiifectuall y prevented in the stove herein described, and that onlifting the outer cover the inner door or cover will also be lifted, thus establishing communication between the magazine and the indirectexit flue, through which all deleterious gases will be instantly drawn and carried off to the chimney.

The provision of the fire-brick back walla insures thorough protection of the rear wall of the stove at the point opposite the fire-pot, and also affords increased and intensified radiation of the heat evolved from the burning fuel, its extensive surface and great thickness contributing largely to the thorough consumption of all the combustible portions of the same. This broad area, when an active combustion is in progress, becomes a valuable light-reflecting as well as a heat reflecting and radiating surface.

The magazine being imperforate,circulation of air through it is prevented, and ignition of the fuel within it is thus rendered inipossible. This not only effects asaving in the quantity of fuel consumed, but greatly increases the durability of the magazine, which would be quickly destroyed by combustion of fuel within it. Explosions also are avoided, whatever gas is produced being retained in the upper extremity of the magazine, where its temperature will be constantly below the point at which an explosion is possible.

I do not claim a stove which is provided in its lower sect-ion with a rear vertical passage which connects at the bottom of the stove with side diving-fiues, and which has openings in its front wallone for direct exit from the combustion-chamber, and the other for the discharge of dust from the ash-chamber. In my construction the indirect-exit passage is in the magazine-section and not in the fire-pot section of the stove, and the air-passage is sepa rate and distinct from the direct-exit passage and from the indirect-exit passage.

I do not claim an indirect exit flue into which air is admitted when the door of the feed-chute is opened,- nor a magazine through which air may be passed from the feed-chute when the cover of the magazine is opened; nor an indirectexit passage-unpr0vided with a direct-exit opening-into which air isconveyed through a passage which is independent of the ash-chamber; nor do I broadly claim two connected doors which are adapted to move simultaneously.

Having described my invention, what I claim is 1. The combination, in a stove, ot' a directexit passage, an indirect-exit passage which extends through the magazine-section of the stove, and an air-passage, the lower extremity of which connects with the ash-chamber, and which leads upwardly from such ashchamber, the indirect-exit passage and the airpassage being adapted to discharge oppositely into the direct-exit passage.

2. The combination, in a stove, ol'a combustion-chamber, a direct-exit chamber or passage, an indirectexit passage, and an airpassage which leads upwardly from the ashchamber, the two latter being adapted to dis charge oppositely into the direct-exit passage.

3. The combination, in a stove, of an unobstructed indirect-exit flue which discharges downwardly into a direct-exit chamber or passage, and a. dampered air-flue which leads directly upward from an opening in the rear wall of the ash-chamber, and which discharges into the direct-exit chamber or passage.

4. The combination, in a stove, of a direct exit chamber or passage, an unobstructed indirect-exit passage, which leads first upwardly and afterward downwardly through the mag azine-section of the stove, a damper for controlling the opening between the combustion chamber and the direct-exit chamber or passage, and a dampered air-fine, the lower end of which connects with the ash-chamber, and

which discharges upwardly into the directexit chamber or passage.

5. The combination of a combustion-chainber, adirect-exit chamber or passage, a damper between the combustion-011amber and the direct-exit chamber or passage, and an air'passage, the lower extremity of which connects with the ash-chamber, and which leads directly upward from an opening in the rear wall of such ash-chamber and discharges into the direct-exit chamber or passage, the main body of such air-passage being located outside of the wall of the stove.

6. The combination of a combustion-chainher, a direct-exit chamber or passage, and an air-passage, the lower end of which connects with the ash-chamber, and which leadsthrough an air warming chamber and extends upwardly along the rear wallofthe same, and which, independently of an indirect-exit passage, conduct-s air from the ash-chamber to the direct-exit chamber or passage.

7. The combination, in a stove, ot' a combustion-chamber, a direct-exit chamber or passage, a damper which controls the opening between the combustion-chamber and the-direct-exit chamber or passage, an indirect-exit passage, which leads from the combustionchamber through the magazine-section of the stove to the direct-exit chamber or passage and discharges downwardly into the same, an air-induction chamber, which constitutes also the ash-chamber of the stove, and an upward ly-discharging passage, which connects the airinduction chamber with the exitchamber or passage.

8. The combination of a combustion-chamher, a direct-exit chamber or passage, an air chamber which encircles the main body of the combustion chamber, and an indirectexit passage, which extends longitudinallythrough such encircling air-chamber and connects the combustion-chamber with the exit chamber or passage.

9. A stove which is provided with an airchamber which encircles the main body of the combustion-chamber, and which extends downwardly behind the fire-pot and ash-chamber sections, and which is also provided with an airfl ue, the lower extremity of which connects with the ash-chamber, and the upper extremity of which discharges into the exit chamber or passage of the stove.

10. The combination of a combustionchant her, an air-chamber which encircles the combustion-chamber, an indirect-exit fine,which leads from the combustion-chamber and extends through the air-chamber which encircles the combustion-chamber, a dampered passage for conducting air from the air-chamber to an upper room, and dampered openings for dis charging air into the room in which the heater is placed.

11. A magazine-stove the top opening of which is provided with a'door which is hinged at the rear of the same, and the magazine of 7 which is provided at its top with adoor which is hinged at the rear of the same, the two doors being adapted by a suitable connection to be simultaneously opened or closed, and the door of the magazine being adapted in the manner described to form, whenopened, a shield or guard to prevent coals from falling into the rear indirect-exit passage of the stove.

12. The combination, in a stove, of a door which is hinged at the rearof the top opening of the same, a door in the top opening of the magazine of the stove which is hinged at the rear of the same, aconnection between the two ,doors by which they are adapted to be simulcombustion-chamber and the direct-exit chanr her, the ash-chamber, the air-passage or dustflue, the lower extremity of which connects with the ash-chamber, and which leads from such ash-chamber to the direct-exit chamber or passage, and the damper which controls the passage from the ash-chamber to the directexit chamber or passage. Y

14. The combination of the fire-pot, the combustion-chamber, the direct-exit chamber or passage, a damper in the opening between the comb ustion-chamber and the direct-exit chamber, the ash-chamber, the air-passage or dustflue, the lower end of which connects with the ash-chamber and conducts air therefrom to the direct-exit chamber or passage,the damper which controls the passage from the ash-chamber to the direct-exit chamber or passage, and the lower or rear air-warming chamber between the fire-pot and its ash-chamber and the air-passage or dust-flue, substantially as and for the purposes described.

SILAS H. LA RUE. Witnesses:

J. P. KREMP, D. KREMP. 

